Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
va hanh » van hanh, va thanh, va danh
hai cua » thai cua, dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
tu dan » tuc dan, tu ban, cu dan
dan ky » van ky
va lao » van lao, va bao, va lap
va dao » ca dao
luc va » duc va, tuc va, loc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu dan ky nang x ho. hieu ((va lao) or (va dao)) luc va hanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky nang x ho. hieu ((va lao) OR (va dao)) luc va hanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu dan ky nang x ho. hieu ((va lao) or (va dao)) luc va hanh hai cua tre*.